<!-- 父级组件:控制除登录页以外所有页面的共有头部与左侧菜单栏-->
<template>
  <div style="display: flex">
    <div :style="{width: (isCollapse ? '64px' : '208px')}">
      <!-- 左侧菜单栏-->
      <el-menu
      background-color="#3c82F5"
      style="width: 100%; height: 100vh"
      text-color="#fff"
      active-text-color="#ff0"
      unique-opened
      :collapse="isCollapse"
      router
      :collapse-transition="false"
      >
        <!-- 左侧菜单栏项部条-->
        <el-row style="padding-top: 10px">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 9px">
            <el-avatar src="/imgs/admin/logo.png" style="width: 35px;height: 35px"></el-avatar>
          </el-col>
          <el-col :span="isCollapse ? 0 : 13">
            <span style="color: #fff; font-weight: bold;position: relative;top: 8px;left: 2px;">智慧车辆</span>
          </el-col>
        </el-row>
        <el-sub-menu index="1">
          <template #title>
            <el-icon style="font-size: 21px;"><User/></el-icon>
            <span>用户管理</span>
          </template>
          <el-menu-item index="/user">用户列表</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="2">
          <template #title>
            <el-icon style="font-size: 21px;"><Van/></el-icon>
            <span>车辆管理</span>
          </template>
          <el-menu-item index="/vehicle">车辆列表</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="3">
          <template #title>
            <el-icon style="font-size: 21px;"><Location/></el-icon>
            <span>围栏管理</span>
          </template>
          <el-menu-item index="/geofence">围栏列表</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="4">
          <template #title>
            <el-icon style="font-size: 21px;"><Place/></el-icon>
            <span>调度管理</span>
          </template>
          <el-menu-item index="/application">用车申请</el-menu-item>
          <el-menu-item index="/audit">用车审批</el-menu-item>
          <el-menu-item index="/distribute">车辆分配</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="5">
          <template #title>
            <el-icon style="font-size: 21px;"><MessageBox/></el-icon>
            <span>字典管理</span>
          </template>
          <el-menu-item index="/dict">字典列表</el-menu-item>
        </el-sub-menu>
      </el-menu>
    </div>
    <div :style="{width: (isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px)')}">
    <!-- 右侧顶部条-->
      <el-header style="height: 10vh;background-color: #fff;padding-top: 22px">
        <el-row>
          <el-col :span="18">
            <el-icon style="font-size: 21px;" @click="changeCllopsed"><Expand/></el-icon>
          </el-col>
          <el-col :span="6" style="position: relative;">
            <el-dropdown trigger="click" style="position: absolute;right: 20px">
              <span style="font-size: 19px;font-weight: bold;">
                {{user.username}}
              <el-icon><arrow-down/></el-icon>
              </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
        </el-row>
      <!-- 右侧顶部条:面包屑导航-->
        <el-breadcrumb separator="/" style="position: relative;top: 20px">
          <el-breadcrumb-item>首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb">{{item}}</el-breadcrumb-item>
<!--          <el-breadcrumb-item>用户管理</el-breadcrumb-item>-->
<!--          <el-breadcrumb-item>用户列表</el-breadcrumb-item>-->
        </el-breadcrumb>
      </el-header>
      <el-main style="height: 90vh;padding: 0;overflow-y: auto;">
        <!--      右侧可变区域-->
        <router-view/>
      </el-main>

    </div>
  </div>
</template>

<script setup>

import {onMounted, ref} from "vue";
import {useRoute, useRouter} from "vue-router";

//定义变量用来控制左侧菜单栏的折叠与展开
const isCollapse = ref(false)
//定义处理左侧菜单栏折叠的方法
const changeCllopsed = () => {
  isCollapse.value = !isCollapse.value
}
//获取当前登录的用户数据
const user = ref(getUser());
//定义退出登录的方法
const logout = () => {
  if (confirm("确定要退出登录吗？")){
    localStorage.removeItem("user");
    //跳转到登录页面
    //router.push('/login');可以用换个方法
    window.location.href = '/login';
    //清空取出来的user对象数据
    user.value = '';
  }
}

//定义数组用来保存当前面包屑导航显示的值
const breadcrumb = ref([])
//定义对象用来保存Path 与 面包屑值 的对应关系
let map = {
  '/user': ['用户管理','用户列表'],
  '/vehicle': ['车辆管理','车辆列表'],
  '/geofence': ['围栏管理','电子围栏'],
  '/application': ['调度管理','申请列表'],
  '/audit': ['调度管理','调度审核'],
  '/distribute': ['调度管理','用车分配'],
  '/dict': ['字典管理','字典列表'],
  '/geofenceMap': ['围栏管理','围栏绘制'],
}
//useRoute()是Vue-router提供的一个方法，用于获取当前路由对象
const route = useRoute()
const updateBreadcrumb = (route) => {
  //从当前路由对象中获取当前的路径path
  const path = route.path
  //自定义更新面包屑值的方法
  breadcrumb.value = map[path]
}
//一进入页面就立即调用更新面包屑导航值得函数，只有在第一次进入页面时会调用
onMounted(() =>{
  updateBreadcrumb(route)
})
//获取路由守卫，监听路由，只要path发生了改变(包含点击左侧菜单栏),就立即更新面包屑
const router = useRouter()
router.beforeEach((to, from, next) => {
  updateBreadcrumb(to)
  next()
})
</script>
